a cytoplasmic tyrosine kinase of the SYK family containing two SH2 domains. Plays a central role in the B cell receptor (BCR) response. An upstream activator of the PI3K, PLCgamma2, and Rac/cdc42 pathways in the BCR response. Required for the sequential events of Fc gamma IIa receptor-mediated phagocytosis. Expression highest in murine spleen, heart, mammary gland and thymus. Two splice variant isoforms have been described. Note: This description may include information from UniProtKB.
Protein type: EC 18.104.22.168; Kinase, protein; Protein kinase, TK; Protein kinase, tyrosine (non-receptor); TK group; Syk family
Cellular Component: T cell receptor complex; extrinsic to internal side of plasma membrane; protein complex; cytoplasm; plasma membrane; nucleus; cytosol; B cell receptor complex
Molecular Function: integrin binding; protein serine/threonine kinase activity; protein binding; protein-tyrosine kinase activity; non-membrane spanning protein tyrosine kinase activity; receptor signaling protein tyrosine kinase activity; protein kinase binding; ATP binding; protein kinase activity
Biological Process: viral reproduction; transcription factor import into nucleus; positive regulation of interleukin-3 biosynthetic process; positive regulation of granulocyte macrophage colony-stimulating factor biosynthetic process; positive regulation of calcium-mediated signaling; regulation of phagocytosis; protein amino acid phosphorylation; activation of JNK activity; leukocyte adhesion; B cell receptor signaling pathway; regulation of transcription factor activity; positive regulation of bone resorption; beta selection; angiogenesis; positive regulation of gamma-delta T cell differentiation; inflammatory response; integrin-mediated signaling pathway; neutrophil chemotaxis; platelet activation; adaptive immune response; regulation of superoxide release; positive regulation of cell adhesion mediated by integrin; positive regulation of mast cell degranulation; regulation of neutrophil degranulation; leukotriene biosynthetic process; cell proliferation; positive regulation of peptidyl-tyrosine phosphorylation; neutrophil activation during immune response; organ morphogenesis; serotonin secretion by platelet; leukocyte activation during immune response; defense response to bacterium; macrophage activation during immune response; innate immune response; blood vessel morphogenesis; positive regulation of B cell differentiation; positive regulation of alpha-beta T cell proliferation; blood coagulation; lymph vessel development; positive regulation of alpha-beta T cell differentiation; transmembrane receptor protein tyrosine kinase signaling pathway; positive regulation of cytokine secretion
LTP: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.